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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a22775469799b862ca14a3553d710a5a950e0f1fe53522f48d98dfc432f09ef' 
  AND token = 'fg1drJDT/kfL4X7aU5TcJKehbCCse+dioRAD8XKeUkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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