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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07cd0d489af17925c9d4338627e056fe28ffb1d2349cb61de42be2c2f59aa86a' 
  AND token = 'yA39mbUR5ezpkBCVmXso6Yp3YZio/LRavEkS1hAWtbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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