SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ddbf9f374ff56237dba39c6b827ca4d4c16245d078a11480600f19142635771' 
  AND token = 'qkgYXfqaQAv4REtzAvsg+psh/aGTFkMjf/SL5IxhPIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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