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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05674ba04127b944a8625be161edd8fd2254c02bc6c346f68b00963d15732a5a' 
  AND token = 'cwwMRjyp33A0c+MFY6P4eWVDdhorUThk052tCQLyQaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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