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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41370f3e9c894501e679e880a167ae672833d0eab1c3c4ea9a56857dbb31952a' 
  AND token = 'dEFEGbSW4qeJ2NCpjQKhx9nm6tOeX1N7VxTUkZ4PXWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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