Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e7bb658a02bf16aecdc4ea43c862f85ebb027f24e78085161553bb50a1c9aea' 
  AND token = 'gHi5Gp2U5gzvyyPMqYTSHLZ8U2466qJ7dEDxrR1MElc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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