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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '063b05c5c12e5ab68c50fec36e61f89e999e629f29e7ea213c9d3b77e6cd8398' 
  AND token = 'li+a/I7xVT2V15PtbKTorrNuaDPh/VtKFXQ+e0J71nY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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