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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65bdd588b041e9c02bcdd26e37d75d6b55ee9a7e507e632de0301d6566aab433' 
  AND token = 'SHccY4qTbfS3CC/ZnH1ktn5eXGIUbYXWuP4dzpdtkNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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