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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '775df71fb72c65708057d3597824cff4f039d506d013c791520ea744f7c40707' 
  AND token = 'NHNIaruT0PopsIGlGs4ySoyBgb37uuQNHidEQdKT6z8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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