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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a82da7cc5b8ca5bf4f0259cef051574a25ec8802fb71fb9fb2e3d9e3fe0dcaa' 
  AND token = 'hNfvSPNeko5Ooy7ugvxnPWdAQPDLXjIYHEw2a3M/H4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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