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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '962f9490789fcca4a8ba3f0e70ecb1b04ebccc38c793c11f187b1142b1ebacb3' 
  AND token = 'OuWvhiXjHitLIGd0h362+IP/Hgp2BswJohNJM7Fcm9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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