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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '032265f4bd52a4d1ea29c2fcfbfa772df5317dacc487d3d4191ff1ec0932a3b7' 
  AND token = 'l8px4Z1WYdL4EP4/K4T6X3vdhDPy3iKjmmpd7SomteI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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