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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07a77ff771d72f3b2e201b9c179ecb3fcfcdf5fb1194e7cfdae905cdd02f8320' 
  AND token = 'fcGlIPWi4VWfPYktYNNAmhrEvHk8hVGg5kw7h6iNrfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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