Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42cf101ed2c91551854477a826ac53c3eb65af641e32b9afebf2ded44f237649' 
  AND token = 'VZliev19AZFGb7TU/9Pj9ANhTxOh1klVQ1pLINzksSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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