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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '579048be2f2da7e5ce0fd67e9d23233fca243e2ae94a45abdd9f43a7a48d2c95' 
  AND token = 'BLKabK29TS9lsnGBcYIXmIATRnjwQ+wN3D3KyWRAFhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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