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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ac7cd8d0bd559e36f839871f5c3425a6ea718b02e7c194b027b5e939f950acb1' 
  AND token = 'hfdKiOIP2rp7J8kOvUVt9F1efWBmSr68edoG1oYVB1w=' 
  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"
    }
  }
}