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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '705fc356cf0aa82ec59f8cdd584f9dc1a49a2aa7f66f9ebf8af154d1d2308eb3' 
  AND token = 'iLIHRoDTE56dGkW8J1vlzb3QwavfRdnQ4qre2Y8hxXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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