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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '33ae6d93073ae59cad4928c0d07998a9f9ea738655607928e1d04bfc35677659' 
  AND token = 'h+6i6wdwRAbOod3FsTX4i2fiVNv/yMZ7RN8e3K3jzwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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