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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efd7ba3b82e45879424cda1d2aeb48396fc7d085ae31e7509ac51694ae65d425' 
  AND token = 'Iuli1HZVUkdNKAcAdplEq4/CivpKloImh7dzzKabXOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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