Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '331e636719fa2fe9cfc812f20d82622a2ca7ad28ab7a22f2f98673eda40f2244' 
  AND token = 'Ih+aI3/NgcKhbuww3aWWoPmYgDnH6Nv+Sur0j+IRjbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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