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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'dd3c20ada1451d008f0a07493e26d16029a6be15ae1b107442d8d3c6adf98af1' 
  AND token = 'LWkfbcm1fr5uQZPjT4iCz4PYmETlPj0FaHErozRCqfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}