Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '959cf4bf0f949bece480f1a5f31b691443c79480999f3cf3437ca3d45f972024' 
  AND token = 'tsH2pmgU4usTXE3e2iJm7KBuAdQxdG1drfN9mCHI5TI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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