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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ce071b9119276f55387d81cd75d0295f78712457d8609a051584e6ebbf9d031' 
  AND token = 'yLwxSCc7wHWfn1TZRklyyqt07OLteMlF/03AGqTJrmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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