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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9467de24498880a0e0c6c73115981b1b6d54c3cf470b716c5ada87aada14a04a' 
  AND token = 'QIIs8VVXl7O78eSWF3G1Vvj/fuWhC0HB/n1qYqLxA6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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