Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7d13bac9c98a8edeb00b4b6e11e03fcd22fa42aa62d4ac4b19ab5d783bdd1c3' 
  AND token = 'jjWUN1/5u2ckEe/9t5utaThNb4peJVMGkvdeXTjfY5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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