SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc7407715e4d48b5cea21be94fb3ba8a7f6057c3e4694873004dafb000b027b9' 
  AND token = '+C2rKXhwgJReom9t9SG/SMC9BQLbnj0sjBNYrCMMXaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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