Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e56f2d3a4a915b9e134369f8bbba0c02b3cfeb7657adec84a663ab455381884d' 
  AND token = '6b9+AKHevxpmwFzdobcC/iFFgqLLcBxygDRtf14egG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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