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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd13d77e90d9ea754a0ff15a26571684ab1757af864469f39c2bdaf7b2305eaf0' 
  AND token = 'rgBNh4AaN70nKKi5D8RuYM8jpx0QRqT38K8e4ZvFlPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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