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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95dc02ad5eecf7945b3e37e4adc86915000aa9da1dff839b51ab3e87885cabf5' 
  AND token = 'rJV8ykxoXXcidCmsVAGAsCHATR1TUQvY9lG3ZJibtXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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