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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f25f4f21a89b8884ac9bbf5285261054d120f89d65ccc3a464f627841cfadea3' 
  AND token = 'GiYF6Dx6WQkgnCXWCa8z/p9vugQGlo4mNfYwwhovkD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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