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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09a5ccba51ee6572efa8b1abcab240ff4c81e561081ec7cdbc5520b663e744cc' 
  AND token = 'Ktcs0KdpSIwhBhU/59flQaAnsNQZHwEfKxJ8MEzf6Po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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