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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '17009eba717e5a3addb5927ebd9469904dd635ce0d9122d93ecdbbb4ab2d5a44' 
  AND token = '8Y6cf7x2KapdkzNJEFc5ZqrOCavuTrF4mFkQWW01aoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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