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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee74011d660c0e5e2f8982389dba8c0fa48f26b816c06be4618fd175c1047bf0' 
  AND token = 'jfML1zJIjcPC6/iUHf+lmubs9tqIX6P5Klq9N+/GtEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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