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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4e4f3b5b925f364a7b663d30c1b7e460ee1d27d675239c289e4e6e62af7ef77f' 
  AND token = 'rF77AjdSSJC9yccqJsNPCPsU+1o9UQj9706vpsapA5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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