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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e664d6814587b7bad6f5c4178f13c0db43ce6415c4c453b706d9ce009fef4ef3' 
  AND token = 'ik1FZygbGpJ7Ox7RX/BoJ764WQ0RurmBcoBFttDT+28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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