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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a58957dea10ff204d3a50711c226680b17410dfbdd61cac99baafa1eef45df22' 
  AND token = 'pFELymG2XzB57tHpAEW0ZbD1fE5y6qTmY3yniF2w95U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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