SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f8c9627488bef20071677428f517d93cd6175053676bc2015464aba385ab009' 
  AND token = 'xbA4QgrZwRPcrZ6RjkQV1xivZ4v2/aawUSTcJdzRX4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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