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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc2066639c08821b402eacfbbfb447f425c2a5157c528be14fb48cad4e01f73c' 
  AND token = 'QQR43l0rQxM+FSFomEXmGeFO0aD3cyF98tf2Y4928qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}