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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e27f8c94412ef86c2092e22bfcd57ccfef5f1eb03f4409ef2b6f1973424f4113' 
  AND token = 'kCvbrC3Wynly9TfXVRVL+hfxwg/CO9mxh3UMdGVet1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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