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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67a31347d1ca05f939f531e110dbc827e5e5d4fc0c085c018e19f500a973ad8e' 
  AND token = 'BTpeJWvlNtrcNTx5LGY9w45C2MvYidUM6PqcuovIV0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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