Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f442ae97b0f880eafe531f7bcc61c601a414861fa3fecbfc7a7e07307149c688' 
  AND token = 'mZWyPdwiDMpdgsAagudz77bu+fOm1TYCS6/6xVQsRt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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