Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f2c0033911e5d382aff8d1291f6550ec2c06516b88f24cf8a2bbc28c6b47d03' 
  AND token = 'mdoLf6tM6PfzuctsBvhqA19nxpl8paGb3R/jl+flB+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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