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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '098802cfbd246be41a79a9525dcca0b133c956ff56a0c9fad6ebb1748857db06' 
  AND token = 'vYkxPp1vizTeXhrUs81PCAkK0lLo00f0+iCB5/3Jk1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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