Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55200dcffa0b0bc5ae773187ff67602fb69bc57e0f917abf35773846ff44686e' 
  AND token = '+9UPgZ93O5M9zs/1ftd64Qt3Dd7JC6YQ2pDGm2Njot4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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