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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132e2ff07a147037d35a3ff262a6a1d86002dfbca8ffa7c1c49a82f92773d888' 
  AND token = 'yJstcKlRag0uHORaofE31qi1qjHCTH0RyWdxYDTNO9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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