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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '169e8ee53fa43b91adcdeca2c9a0191272a694041152afbfe3f0f02ccb09d456' 
  AND token = 'jGzcThAdY3AZpaNivx4y1qE/EMhe3T/spmFy+H2dc0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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