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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd18f71b28f2841ef3099d5af272c4163348a5a6a9b413ae540557fbe044822b' 
  AND token = '2LfJg3r2flg9lc0OBwpESXNEzo/GS9Yz57mYIaGnH4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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