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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f107575c0c607a6de2eb466e9b62ae9f48ddf91d495e180044bfd075f8f67786' 
  AND token = 'zbppVVaabVNymRGU86tyvp8zw42VY7ngdyBtZJ7rHuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}