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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2718d788aa41a810e5b6f37b01f69bda03b7e051d146f35b440ab463fa44793b' 
  AND token = 'wJYxGL6KAVL4o1Qgz6na2sYHz4t8LEEsbl83AQNNmIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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