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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65f3c5a0eb2fbe568a66065142538cc5b023a3ffff4a568862077e17d537fd72' 
  AND token = 'pQCBNiJom4iSZcb6umUAqxp1Yjra8BDyHAc1JTIUL4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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