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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d48f77619097025b0b860e7789542a8b3e8bc7b5983444a17ba49de6cac6e0' 
  AND token = 'T3ShT5i9g3mjYIREs+pQHVurW3Zbm+BXK7PLo1SGBrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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