Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed52aa257fcc0b0b88c1d7014c8ec9cf5e9aa3e4eef0e22a1959d3b883093a86' 
  AND token = 'E+1dE1o7EnfpcYbNLSDUEgX9gDncIJhcAj7F9VcIXTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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