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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bebdb24e74156fa8365a90b5560667db1715cdcf0d11e21cc4a801a095cc228f' 
  AND token = 'VsBV1FCCDOw0Z6wY/EWyAl/EYqcU93NhcmkZanJ9obw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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