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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a550b7acb667e4f7e0551fd63211916ae81037ab4a5bb164668f01040a0d639' 
  AND token = 'CngjsO1ziF8BI8vC5CJ5JRo1RQpA3z1IgnLEVo8Ajb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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