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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5157edd710936ea8892d282bdf7a27c7865876f09279db3ce106142cc16c77dc' 
  AND token = '58ki7d4oAJ8Hajnytd4IahXQ+QSVblAxHXaxT4JbfI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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