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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'b0902beb8bde1dacb8c50b96c29b67be89978dd02333ad7539c6e5a33963d18b' 
  AND token = 'vJRAYfwoUnzIWlxUzPMyzoDbgUBHFmUqwhw1hQAWh6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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