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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '77327b011809a9afceb390bec03d75a5d7494492897651207f31008f9b68217e' 
  AND token = 'Gua36dCFr1oNG5zACtXBuW6cUds5izyioIO4jlpQ6I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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