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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06f956d4b64c64ce163c07e92a1fc96797638fe31311814ad18a1076e61a00af' 
  AND token = 'NpA4l7V5xCVuzVWY9NErIg2JT0CsjFO1IxVcU5mkjnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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