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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dae9b93aa92a765dfa9b6e35f59c2a5fe972a2c8bea90d758905c9c01a94eb08' 
  AND token = 'AkRL65VWNkA8RqUWV+OsypwOsgMWux97qKB+u4K0Gu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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