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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8082449e176534b9115d58bea5eee1350fe19ba683dac187ed24c06ae9deb27' 
  AND token = 'TMILqHV0Jrj2K0sZukA5ADqh2yx62erfFehrArc/f2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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