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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fcee22ad201feb1ad7fe82c837ef49a94c3ebac30dff69330e9aa4b41ee9cdde' 
  AND token = 'NMBg0+EMHkS1eHoBIAO41BzXtA1Q5z2FPxMDchNdCas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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