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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007d587a5436bda1a80cc4bcafadab5ab159f78cd1031bdb6dfe31dcfda8ec25' 
  AND token = 'S448m5ddSvfT8GlGtVdDE8oiPwHgm7Wa1b7dfLJspic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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