Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e0052758579af066c4c58388d3c2697b1c0f949151a0c467be5476f6d0a59c5' 
  AND token = 'JxEMp8i80BprRi5fkzQHxkMZ38SKPNt2VyyLsVLSuUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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