Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01e98aa31715299273f656751cf763bb43569461ca3f19d576e53d5b31a24e1a' 
  AND token = 'LDDZn+GTfe0+v86t07FVGakKpEYFlf+R2sdPU8TEpnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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